Bogie mounting arrangement



Sept. 29, 1964 P. scHwARzwz-:BER 3,150,612

Bosma MOUNTING ARRANGEMENT Original FiledJuly 30, '1952l 5 Sheets-Sheet 1 Fi .3 I 1011022304 9 3l ATTORNE y Sept 29 1954 P. scHwARzwEBER 3,150,612

BoGIE MOUNTING ARRANGEMENT Sept. 29, 1964 P. scHwARzwEBER 3,150,612

BOGIE MOUNTING ARRANGEMENT Original Filed July 30. 1952 5 Sheets-Sheet 3 --lllmpll im D/ 3o IN VE NTOR 'fl'r .una uns TTOR/VE Y United States Patent O 3,150,612 BUGIE MUUNTING ARRANGEMENT Peter Schwarzweber, Auenstrasse 86, Munich 5, Germany Original application July 30, 1952, Ser. No. 301,718, now

Patent No. 2,085,970, dated May 12, 1959. Divided and this application Jan. 23, 1959, Ser. No. 788,636 Claims priority, application Great Britain, May 23, 1952,

13,130/ 1952 7 Claims. (Cl. 10S- 199) This invention relates to a pinless bogie mounting arrangement for vehicles, ie., that class of bogie mounting which dispenses with the use of a vertical centre pivot forming an axis about which the vehicle body and the bogie are relatively rotatable.

The invention is a divisional application of the cpending application, Heumann et al., for Bogie Mountings of Rail Vehicle, Serial No. 301,718, led July 30, 1952 on which U.S. Patent 2,885,970 issued to E. Heumann.

It is an object of the invention to provide an improved bogie mounting arrangement in which the lateral and longitudinal stresses are each transmitted through one or more separate lever assemblies.

Another object of the invention is to mount a vehicle body on a bogie turnable about a vertical axis by means of a single quadrilateral lever` system which transmits both the longitudinal and lateral stresses while leaving a free space at the centre of the bogie to accommodate at least part of the vehicle drive mechanism.

A still further object of the invention resides in the provision of restoring or centering devices associated with the bogie mounting arrangement.

These and other objects of the invention and the advantages thereof will be more clearly understood from the following description of particular embodiments when read in conjunction with the accompanying drawings, in which:

FIGURES 1 through 3 show a constructional embodiment of vehicle bogie mounting according to the invention, FIGURE l being a plan view, partly in section on line I-I of FIGURE 2;

FIGURE 2 is a longitudinal section on line II-II of FIGURE l;

FIGURE 3 is a transverse section on line III- III of FIGURE 1;

FIGURE 4 is a schematic plan view illustrating the arrangement of FIGURES 1 through 3;

FIGURE 5 is a schematic plan view illustrating a modiiied arrangement of the present invention;

FIGURE 6 is a schematic plan view illustrating still another modied arrangement of 'the present invention; and

FIGURE 7 is a schematic plan view illustrating a still further arrangement according to the present invention.

Referring now to the drawings and iirstly to the constructional embodiment shown in FIGURES 1 through 3, the vehicle frame or body 1 is shown as being of welded plate construction comprising a pair of horizontal top plates 101, 102 from which depends a box-like eX- tension 3 consisting of vertical end plates 103, vertical side plates 104 and a bottom plate 105. The extension 3, which is of rectangular shape in plan and is arranged symmetrically with respect to the longitudinal and transverse median planes X and Y of the vehicle, is disposed with its major axis in the direct-ion of travel. The bogie or truck frame 2 is also shown as being of welded plate construction and comprises a top plate 201, bottom plate 202, side plates 203 and end plates 204. The top plate 201 is formed with an aperture 205 through which the extension 3 of the body projects, said aperture being of sufficiently large dimensions to permit the extension to 3,150,612 Patented Sept. 29, 1964 ice turn therein about its Vertical axis as the bogie swivels relatively to the body.

The bogie frame in plan is of H-shape, having a pair of longitudinally extending arm portions 206 at either end. Each of these arms carries a laminated spring 207 secured to the arm by shackless 208, and a strap 209 on the spring couples the latter to a journal provided on one end of a lever 210 pivoted at its other end at 211 to the bogie frame. Each pair of journals is provided with self-aligning roller bear-ings 212 in which the shaft 213 of the corresponding pair of rail-engaging wheels 214 is mounted.

The vehicle body is supported on the bogie frame 2 by a spring suspension system comprising a pair of laminated springs 215, one at each side of the vehicle, the ends of which are carried by rods 216. Each rod has secured thereto at its upper end a cap 217 between which and the bracket 218 projecting from the adjacent bogie frame side plate 204 is a coil spring 219. Each spring 215 carries a centrally located strap 220 which is pinned at 221 to a bracket 222 depending from the body frame 1.

The longitudinal forces, i.e., the tractive and braking forces, and the transverse forces are transmitted between the vehicle body and the bogie frame by a closed quadrilateral system of pivoted levers which also provides for rotational mounting of the bogie relatively to the body around the virtual axis O constituted by the intersection of the planes X and Y. As shown in the constructional embodiment of FIGURE l through 3 and schematically in FIGURE 4, the quadrilateral system comprises a pair of longitudinal levers 8 arranged parallel to one another at opposite sides of the longitudinal median plane X of the vehicle, and a pair of transverse levers 9 arranged parallel to one another at opposite sides of the transverse median plane Y. The levers 8 and 9 have their adjacent ends pivotally interconnected at A, the levers 8 being pivoted at D on the bogie frame 2 symmetrically with respect to the longitudinal plane X and the levers 9 being pivoted at F on the vehicle body 1 symmetrically with respect to the transverse plane Y. Each pivot point D is spaced equally from the associated pivots A and similarly each pivot point F is spaced equally from the associated pivots A, so that always one or other pair of associated pivots D or F is located in the transverse median plane Y or the longitudinal median plane X respectively of the bogie 2.

As constructionally shown, each longitudinal lever 8 is shaped to embrace the adjacent ends of the transverse levers 9. The two levers S are of equal length, as are also the two levers 9, the levers 8 being longer than the levers 9 so as to form a rectangular quadrilateral lever system. These pairs of levers may, however, be of equal length to provide a square quadrilateral lever system. The pivots D of the longitudinal levers 3 are each mounted in upper and lower plates 224, 225 secured to a side 203 of the bogie frame, and the pivots F of the transverse levers 9 are each mounted in an upper plate 105 and an extension plate 107 of the bottom 105 of the vehicle body extension 3. The pairs of plates 224, 225 and 106, 107 are spaced to provide vertical clearance sufficient to permit the necessary spring travel of the suspension system arranged between the vehicle body 1 and the bogie frame 2.

When the bogie travels round a curve, the pivots D are caused to move out of the transverse median plane Y in opposite directions. At the same time the pivots A connecting the ends of levers 8 and 9 are caused to describe arcs about the pivots F of the levers 9, so that the pivots D must also move in an arc concentric with the virtual axis of rotation O. Thus the bogie 2 is caused to turn about axis O, which is the equivalent of the eiiect o produced in a bogie mounting having a fixed central pivot pin.

The closed quadrilateral bogie mounting arrangement described vabove is constituted in effect by two pairs of quadrilateral linkages, each linkage consisting of two parallel levers corresponding to a half of the levers 8 or 9 and pivoted at one end D or F either to the bogie in the transverse median plane or to the vehicle body in the mean longitudinal plane, the other ends of the levers being pivotally connected at A to the opposite ends of a link 9 or 8 which is similarly pivoted at F or D at its middle point either to the vehicle body or to the bogie. As the pivots D and F are coincident, the four quadrilateral linkages can be condensed to a simple quadrangular form of four levers of which the opposite pairs are parallel and of the same length and are centrally pivoted to the bogie and vehicle frame respectively in the transverse and longitudinal median planes.

In the embodiment of the invention described above, the levers 8 and 9 have the pivots A, D, A and A, F, A, arranged in straight lines parallel to the respective longitudinal and transverse median planes X, Y, while the two pivots D and the two pivots F are equally spaced from said planes and from the pivots A. FIGURE illustrates a modification in which, while the four quadrilateral linkages are again constituted by a closed system of four levers 8, 8 and 9, 9 pivotally connected together at their ends. However, the construction of the levers 8 and 9 is here such that the pivots A, D, A and A, F, A each form a triangle. In addition, the pivots D connecting levers 8 to the bogie are displaced so that they both lie to the same side of the transverse median plane Y and are unequally spaced from the corresponding end pivots A. Similarly, the pivots F connecting levers 9 to the vehicle body are displaced so that they both lie to the same side of the longitudinal median plane X and are unequally spaced from the corresponding end pivots A. The levers of each pair 8, 8 or 9, 9 are of identical construction, but despite their asymmetrical arrangement it is essential that the distance from each pivot D of the levers 8 to the virtual axis of rotation O shall be equal to the distance between the pivots F and the pivots A of the lever 8 corresponding to the respective pivot D. Thus as the distance of one pivot D from the virtual axis of rotation O is here greater than that of the other pivot D from said virtual axis, the dimensioning of levers 9 must be such that the pivots A thereof are correspondingly spaced from the pivots F connecting said levers to the vehicle body in order that the bogie can carry out a turning movement about the axis O. The two pivots D during such turning movement move in arcs of different radius about the axis O, and the pivots A move in arcs of similar radii about the pivots F.

FIGURE 6 shows another embodiment of a vehicle bogie mounting arrangement having a closed quadrilateral lever system, in which the two transverse levers 9, 9a pivotally connected at F to the vehicle body are arranged to the same side of the transverse median plane Y. With this arrangement, the two longitudinal levers S each have one end pivoted at D to the bogie in the transverse median plane, the pivots D being disposed symmetrically with respect to the virtual axis of rotation O. The ltwo transverse levers 9, 9a are pivotally connected to the levers 8 at points A1 and A2 located beyond the end of the bogie and the pivots F are also disposed beyond the end of the bogie.'

One of the transverse levers 9a is fitted with a restoring device 10 which applies an opposing resilient pressure on the pivot F of said lever when the bogie moves transversely relative to the vehicle body. As here shown, the restoring comprises a housing rigidly secured to the vehicle body and in which is slidably arranged a bearing block 16 which carries the pivot F by which the restoring device is connected to the lever 9a. Interposed between each end of the block 16 and the adjacent end of the housing 15 is a coil spring 17.

When applying transverse forces to the bogie, e.g. when the vehicle travels round a curve, the levers 8 are turned about the pivots A1 to such an extent by the transverse force applied to the pivots D that the moment of the restoring device 16 on the lever arm between the pivots A1, A2 corresponds to the side thrust on the lever arm between the pivots A1, D, so that the lever 9a and with it the bearing block 16 and pivot F are displaced within the housing 15 in opposition to the action of one of the springs 17. In this way the bogie is caused to carry out a transverse pivotal movement relatively to the vehicle body. When the vehicle again reaches a straight track and the lateral thrust on the pivots D is removed, thc action of the springs 17 restores the bogie to its normal central position relative to the vehicle body. The bogie mounting in this arrangement provides the same effect as a bogie mounting having a laterally displaceable springloaded central pivot.

Instead of mounting the housing 15 on the vehicle body and connecting the guide block 16 to the lever 9a, the housing can be secured to said lever and the block connected by the pivot pin F to the vehicle body.

Resilient longitudinal displacement of the bogie and vehicle body relative to one another can be obtained by fitting one of the two pivots D with a restoring device 20. As here shown, this device again comprises a housing 21 in which a guide block 22 is slidable, the housing being secured to the bogie and the bearing block being connected to the associated lever 8 by the pivot D. The block 22 is engaged at opposite ends by pins 23 (only one of which is shown) which are carried by straps 24 mounted on leaf springs 25, the springs being coupled together by tie bolts 26.

Restoring devices such as shown at 10 and 20 in FIG- URE 6 may be fitted to the bogie mounting arrangement of FIGURE 4. Alternatively the levers 8, 8 and 9, 9 of FIGURE 4 may themselves be of resilient construction. As shown in FIGURE 7, each of the longitudinal and transverse levers of FIGURE 4 is replaced by a leaf spring 30 or 31 having pivots A at its ends and carrying a strap 32 provided with a pivot D or F. If it should be desired for the bogie to be displaceable resiliently in only one direction, for example laterally, then only two of the levers, i.e. the longitudinal levers 8, are replaced by leaf springs. The leaf springs are each preferably assembled symmetrically about the main leaf.

In all the embodiments described above, the longitudinal and lateral forces are taken up by the assembly of levers 8, S and 9, 9 or their equivalent 30, 3i), and 31, 31. The pivots F on the vehicle body and the pivots D on the bogie are in principle interchangeable in such manner that the pivots D may be articulated on the vehicle body and the pivots F on the bogie. All the pivots A, D and F are advantageously mounted in rubber cushioned bearings in order to produce a reduction of impact and a mounting or articulation which has limited movement, is free from wear, and is elastic and noiseless. The articulation of the levers or their equivalent should be effected in a horizontal plane, which plane should be as low as possible.

While the invention has been illustrated and described as embodied in a bogie mounting arrangement in which a vehicle body is mounted on a bogie for turning movement by means of a quadrilateral lever or equivalent assembly, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. For example, two lever assemblies may be employed, one for transmitting the longitudinal stresses and the other for transmitting the lateral stresses. Each such assembly basically comprises a pair of parallel levers having one end thereof pivotally connected to the bogie or to the body and interconnected at their other ends by a third lever which is pivotally connected to the body or to the bogie. The two assemblies are arranged substantially at right-angles to one another and thus they may be combined and simplified to comprise, for example, one lever 8 and one lever 9, With half the other lever S and half the other lever 9 of the embodiment of FIGURE 1.

I claim:

1. In a rail vehicle, in combination, a bogie; a body mounted on said bogie; a stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body about a virtual central vertical axis and comprising a first pair of parallel levers extending longitudinally of the vehicle and a second pair of parallel levers extending transversely of the vehicle, the levers of at least one of said pairs of parallel levers being disposed a-t opposite sides of the corresponding median plane of the bogie; means pivotally connecting the irst pair of parallel levers to the second pair of levers; means pivotally connecting the levers of one pair of parallel levers to the bogie; and means pivotally connecting the other pair of levers to the body.

2. In a rail vehicle, in combination, a bogie; a body mounted on said bogie; a closed stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body about a virtual central vertical axis and comprising a iirst pair of parallel levers extending longitudinally of the vehicle at opposite sides of the longitudinal median plane of the bogie, and a second pair of parallel levers extending transversely of the vehicle at opposite sides of the lateral median plane of the bogie; means pivotally connecting the ends of said first pair of levers to the ends of said second pair of levers; means pivotally connecting the levers of one of said pairs of levers to said bogie at points intermediate their ends; and means pivotally connecting the levers of the other pair of levers to said body at points intermediate their ends.

3. In a rail vehicle, in combination, a bogie; a body mounted on said bogie; a closed stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body about a virtual central vertical axis and comprising a rst pair of levers extending parallel to the longitudinal median plane of the bogie and arranged symmetrically at opposite sides of said longitudinal plane, and a second pair of levers extending parallel to the lateral median plane of the bogie and arranged symmetrically at opposite sides of said lateral plane; means pivotally connecting the ends of said first pair of levers to the ends of said second pair of levers; means pivotally connecting the levers of one of said pairs of levers to said bogie at points lying in one of said median planes; and means connecting the levers of the other pair of levers to said body in the other of said median planes.

4. In a rail vehicle, in combination, a bogie; a body mounted on said bogie; a closed stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body about a virtual central vertical axis and comprising a first pair of parallel levers arranged asymmetrically with respect to the longitudinal median plane of the bogie at opposite sides of said longitudinal plane, and a second pair of parallel levers arranged asymmetrically With respect to the lateral median plane of the bogie at opposite sides of said lateral plane; means pivotally connecting the ends of said tirst pair of levers to the ends of said second pair of levers; means pivotally connecting the levers of one of said pairs of levers to said bogie at points intermediate their ends; and means pivotally connecting the levers of the other pair of levers to said body at points intermediate their ends.

5. In a rail vehicle, in combination, a bogie; a body mounted on said bogie; a stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body about a virtual central vertical axis and comprising a iirst pair of parallel levers extending longitudinally of the vehicle and a second pair of parallel levers extending transversely of the vehicle, the levers of at least one of said pairs of parallel levers being disposed at opposite sides of the corresponding median plane of the bogie; means pivotally connecting the first pair of parallel levers to the second pair of levers; means pivot- 'ally connecting the levers to one pair of parallel levers to the bogie; and means pivotally connecting the other pair of levers to the body, the levers of at least one of said pairs of levers being formed as leaf springs.

6. In a rail vehicle, in combination, a bogie frame; a body frame mounted on said bogie frame; a stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body frames about a virtual central vertical axis coincident with the point of intersection ofthe longitudinal and lateral median planes of the bogie and comprising a lirst pair of horizontal levers extending parallel to one of said median planes of the bogie at opposite sides thereof, and a second pair of levers extending parallel to the other median plane of the bogie; means pivotally connecting one end of said lirst pair of levers to one of said frames in the said other of said median planes; means pivotally connecting the ends of one of the levers of said second pair of levers to the levers of said rst pair of levers at the other ends of said irst pair of levers; means pivotally connecting the ends of the other of the levers of said second pair of levers to the rst pair of levers intermediate the ends of said first pair of levers; and means pivotally connecting said second pair of levers to the other of said frames in the said one of said median planes.

7. In a rail vehicle, in combination, a bogie frame; a body frame mounted on said bogie frame; a stress-transmitting quadrilateral lever assembly providing for relative turning movement of the bogie and body frames about a virtual central vertical axis and comprising a tirst pair of parallel levers extending longitudinally of the vehicle, and a second pair of parallel levers extending transversely of the vehicle, the levers of at least one of said pairs of parallel levers being disposed at opposite sides of the corresponding median plane of thebogie frame; means pivotally connecting the lirst pair of parallel levers to the second pair of parallel levers; means pivotally connecting the levers of one pair of parallel levers to the bogie frame; means pivotally connecting the levers of the other pair of parallel levers to the body frame; and resilient means connected between said bogie and body frames at the point of connection of at least one of said frames with one of said pivotally connecting means to restore the bogie and body frames from a position in which the longitudinal median plane of the bogie frame is out of alignment with the longitudinal median plane of the body frame to a position in which said planes are aligned.

References Cited in the file of this patent UNITED STATES PATENTS 450,157 Hubbard Apr. 14, 1891 805,105 Timmis Nov. 21, 1905 1,266,565 Eaton May 21, 1918 1,728,832 Kjolseth Sept. 17, 1929 2,515,812 Waldvogel et al Iuly 18, 1950 2,620,743 Taylor Dec. 9, 1952 FOREIGN PATENTS 1,057,459 France Oct. 28, 1953 489,863 Italy Jan. 29, 1954 937,829 Germany Ian. 19, 1956 762,454 Great Britain Nov. 28, 1956 

1. IN A RAIL VEHICLE, IN COMBINATION, A BOGIE; A BODY MOUNTED ON SAID BOGIE; A STRESS-TRANSMITTING QUADRILATERAL LEVER ASSEMBLY PROVIDING FOR RELATIVE TURNING MOVEMENT OF THE BOGIE AND BODY ABOUT A VIRTUAL CENTRAL VERTICAL AXIS AND COMPRISING A FIRST PAIR OF PARALLEL LEVERS EXTENDING LONGITUDINALLY OF THE VEHICLE AND A SECOND PAIR OF PARALLEL LEVERS EXTENDING TRANSVERSELY OF THE VEHICLE, THE LEVERS OF AT LEAST ONE OF SAID PAIRS OF PARALLEL LEVERS BEING DISPOSED AT OPPOSITE SIDES OF THE CORRESPONDING MEDIAN PLANE OF THE BOGIE; MEANS PIVOTALLY CONNECTING THE FIRST PAIR OF PARALLEL LEVERS TO THE SECOND PAIR OF LEVERS; MEANS PIVOTALLY CONNECTING THE LEVERS OF ONE PAIR OF PARALLEL LEVERS TO THE BOGIE; AND MEANS PIVOTALLY CONNECTING THE OTHER PAIR OF LEVERS TO THE BODY. 